I have a SE Rainbow vaccuum cleaner (Model D4C) that I purchased new in 1986. Yes, it's 25 years old! With the exception of replacing the basin (which I dropped & broke), I have only had to replace the brush & belts on the power head. It was well worth the money. I was thinking about buying a new model, but after realizing the high cost, I'm leaning more toward just repairing the one I have. The problem I am currently experiencing is when I press the button to turn the unit on, the length of time it takes for it to come on is increasing more & more. The last time I used it, it took about 5 minutes! Could this be that the motor is shot or could this be the thermastat sensor? Thank you for any information you can provide me!

The carbon brushes in the motor could possibly be worn out and making very poor contact. We have repair service at your home the next day.http://www.rainvac.com/rainbow-vacuum-re...The carbon brushes in the motor could possibly be worn out and making very poor contact. We have repair service at your home the next day. http://www.rainvac.com/rainbow-vacuum-repair

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The Rainbow D4, D4C and SE all are the same vacuum base, only changes were made to the nozzle. As long as the nozzle cord on your D4 has 2 prongs, not 3 prongs you can use the D4 nozzle that looks like This or the SE PE (SE Performance) Nozzle that looks This

There is only one difference between the D4 and the D4 SE, which stands for D4 (Special Edition). It is the exhaust plug screws in on an SE and snaps in on a regular D4.

Then the SE-PE came along, which stands for (Special Edition-Performance Edition) which has a more powerful motor, with larger motor brushes, for more power and runs on 9.8 amps, where the regular SE and D4 run on 8.8 amps. It also has the newer PN-2 power nozzle, which is very much like the latest E and E2 series Rainbow vacuums, instead of the earlier rectangular ones, that have the bottom metal plate, which will rust. You can upgrade your D4 to one of these, though you will need the electric hose with gas pump style handle, with the built in power corn in it.

They are all D4 models.

If you have any more questions let me know. I am a Rainbow seller, and a Rainbow expert also.

Is the basin in place? There is a safety feature that will not allow the rainbow to turn on unless ontop of the basin. Also there should be a tap ontop of the basin that lets the rainbow know it is in place, make sure it is not broken off. If so, you will need to get a new basin. If purchased through a independent dealer, it may be under warranty. Less than 4 years old, everything is covered in the warranty.

you have to splice them.
Use crimp-on wire connectors (best), or threaded twist-on wire connectors. Do NOT just twist wire strands together and tape wires without using wire connectors . . . that is a NO-NO.

Remove the 4 screws on the bottom of the canister, and also carefully remove the water basin gasket. You will reattach the gasket with rubber contact cement when you're finished with your repair/cleaning.

There is no reset button, but some of those old switches are very touchy . . . if there was some
corrosion, you may not have a good contact (was enough of the new wire insulation stripped away, before putting it into the switch) . . .
I prefer splicing, rather than going all the way to the switch . . its just a matter of cutting out the old cord and splicing in the new cord in a convenient spot up in the motor compartment. . . a Rainbow purist would run the new cord all the way up into the power on/off rocker switch that's built into the top of the handle and then wire the new cord in there, directly at the switch . . . that way means no splicing . . . I've done it both ways, but I prefer to splice and use wire connectors inside the motor compartment . . . because going further, all the way up directly into the on/off switch just to avoid splicing the new cord in requires taking more things apart . . . and risks screwing up the power switch . . . that's not worth the extra time and trouble, IMHO. (This from someone who has dismantled and refurbished over 200 D4C and SE models)